Hello! I just purchased HPTuners and want to begin learning how to tune my car. What are some good resources I can start to look at so I know what to look for when data logging and what changes to make? I noticed when I put my downpipe in, I was getting mpg gains fast but now the car is definitely getting drastically lower MPG. I suspect the car is detecting the increase in mileage and retarding the tune. Any advice?
Attached is my stock tune and a data log.
1-17-2020-20_30.hpl
stock.hpt